Means for forming sewing ribs for welt-type insoles



Jan. 27, 1948. v. A. SHERBROOK MEANS FOR FORMING SEWING RIBS FOR WELT-TYPE INSOLES Filed May 27, 19.46

INVENTOR. WM. Jlza'brook n 3 WW Patented Jan. 27, 1948 MEANS FOR FORMING SEWING RIBS FOR WELT-TYPE INSDLES Victor A. Sherbrook, East Millbury, Mass, as-

signor to Paul 0. MacBride, Waban, Mass.

Application May 27, 1946, Serial No. 672,351

14 Claims.

This invention relates to means for removing a strip from the feather of a welt-type insole having a preformed sewing rib, for the purpose of reducing the thickness of the feather so that the same may be folded up into close association with the sewing rib to be secured thereto for strengthening the same and also to do away with the feather itself.

It has been recognized in the art that it is a desirable feature to avoid the use of a feather in a welt-type insole and it has been proposed as shown in Patent No. 2,379,480, July 3, 1945, to make the sewing rib es customary but to add to the rib a further strip which comprises the feather after the latter has been considerably reduced in thickness by removin a strip therefrom at the flesh side of the leather. When this strip has been removed, the remaining grain side of the feather is easily folded upwardly into contact with the sewing rib to strengthen the same and to do away with the feather completely. Advantages of this construction are enumerated in the patent above referred to.

This invention has for its primary object provision of means for easily and quickly reducing the feather by removing a strip therefrom at the flesh side thereof and comprising a slitting knife which is adapted to travel relative to the insole to slit the strip above referred to in combination with a constant pressure guide impinging the sewing rib at the opposite side therefrom, i. e., the interior aspect of the sewing rib with respect to the insole, and a presser gauge located directly in front of the blade in close relation thereto to aid in guiding the blade and,

to insure proper thicknes of cutting thereof; the cutting blade, the pressure guide, and the presser gauge all being generally fixed together in a single unit and having a reciprocatory motion in the direction of the length of the feather of the insole to accomplish the purpose described; fur ther in combination with a, holding foot which is serrated to contact the feather in advance of the cutter and presser gauge for the purpose of either of feeding the insole or of holding the same during the cutting stroke of the blade, said holding foot having a vertically reciprocatory motion at right angles tothe direction of reci rocatory motion of theunit aforesaid-to the end.

that the strip removed from the feather'shall be uniform in depth and width andeasily cut and removed even aroundthe sharp are at the toeof the insole.

. Further objects include the provision of a device as above described wherein the presser gauge is recessed or hollowed out to receive the holding foot therein so that the latter may approach relatively to the cutting blade as closely as possible for greater accuracy during the cutting operation, it being understood that the presser gauge is in terposed between the cutting blade and the holding foot, and it is particularly pointed out that the provision of the holding foot to impinge the feather is an important part of this invention because of the improved result in the cutting action over prior art devices wherein a holding foot is used to impinge on the insole within the sewing rib and not on the feather.

Other objects and advantagescf the invention will app-ear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 is a perspective view illustrating the invention,

Fig. 2 is a view similar to Fig. 1 but showing the parts separated for clarity of illustration,

Fig. 3 is a view in front elevation, parts being in section,

Fig. 4 is a view in end elevation, the insole be ing in section, and

Fig. 5 is a view showing a modified holding foot.

In Fig. 1 the insole is indicated at H) and this insole has already been guttered at l2 to form a part of the sewing-rib 14 which extends upwardly from the insole. The feather is shown at it. As clearly shown in Figs; 1, 2, and 3, the present device is provided for the purpose of reducing the thickness of the feather l6 by slitting or cutting off a strip 3 from the flesh side of the insole leaving a thin grain side 20 to be folded up into contact with the sewing rib M for the purpose described.

A knife holder is indicated generally at 22 and this holder may be of conventional design and is adapted to hold a blade 24 therein. As is well known in the prior art, the blade holder is secured as by'a fastener in slot 26 to avibratory arm which is power driven so as to provide a reoiprocatory motion to the blade holder and blade in the direction of the arrow 28 in Fig. 3, that is, parallel to the feather. I

This invention provides a constant pressure guide to impinge .and run on the sewing rib I 4 asmost clearly shown in Fig. 4. This pressure guide comprises a leverhaving a portion 30 ridme against the rib l4 directly opposite the knife blade'l l. The other end of the lever comprises a handle 32 which is spring pressed in a counterclockwise direction in Fig. '4 by means of a spring 3 34 which finds a bearing point on a bracket 36, the latter being vertically adjustable by means of a screw 38 in a bracket 40. Bracket 40 and knife blade holder 22 are secured to the same power driven element for simultaneous motion.

A presser gauge 42 is also secured to the same power driven element and this gauge rides on the feather l6 in glosely spacedrelation to the cuttingedge of the knife blade, gauging the depth of the cutting thereof and closely holding the feather so as to provide a, positive, smooth acting out by the blade 24. The actual relation .of these parts is clearly shown in Fig. l and is shown spaced in Fig. 2 for a better understanding of the relationship thereof.

The presser gauge is hollowed'out or recessed at the side opposite the sewing rib as Clearly shown at 44 for the purpose of receiving partially therein a holding foot 46, the latter being serrated on the bottom for the gripping of the feather. This constructionprovides a substantialwid h for. he pressergaugaalong the rib Is and atthe sametin eaallows the holding footdS to. c me as close as po si le-tothecut ine e ge ,ojv the blade .14. The holding footris'secured to .a. br cke to. which is .in pa teda vertical reciprocatory motion as shown by arrows 50in Fig.3.

,In the operationof the device the unit comprising the three members, blade :24, constant pressure, guide 30,,and presser gauge 42, israpidly reciprocated as described so as tocut the strip I8 as shown by shortd'hpid steps and it will be seenv that this strip will (always be uniform due to the guide and the gauge described, this uniformity extending both to width of out and-depth of cut as will be readily understood. The'holding foot may be -1 J.s ed to :hold the insole just during the cutting steps and due to the recess. th s hol ing foot will come .as cl se asis P sibleto the l dinaede o egknife blade. T e operation is that the cutting knife moves tothe left in Fig. 3 when the holding foot 46 .is down and thenmoves to the right in Fig.3. whereup the holding foot rises and tends to allowforward feed of thei-nsole either by hand orby-th -ection of the knife blade in holding the cut strip 18. Of course, it .will'be seen thatthe holding foot. 4.6 may be reciprocated in the same direction as the cutting unitto actually push them- .solealongand this-also comes within the scope of the present invention.

This invention a s con emplates-a holdin foot 46' provided with a sec ndpart-fl contacting the insole inside of the rib 14 so that the r b i straddled thereby and the insole is i pinged at both sides ofv the rib.

Having thus described my invention and the advant ges the eo .1 do not wish to lave-ti ti ted to details hereind s osed otherwisethan as s t fo n-the cla msbut: whatj'l claimis:

4 sewing rib on the insole, so that the two holding feet straddle the rib.

3. Apparatus for removing a strip from the feather of an insole having a sewing rib comprising a knife arranged to relatively travel along the feather and slit the same, a pressure guide engaging the rib at the side opposite from the feather at a point adjacent the knife, the knife and the guide traveling togetherasrespects the said feather, and a holding foot engaging the .uncut feather just in front of the knife.

.4. Apparatus for removing a strip from the feather of a welt-type insole having a preformed sewing rib, to reduce the thickness of the feather, comprising a .knife, a pressure guide engaging the rib in the region of the kn fe at the side of the rib opposite the knife, a pressure gauge associated with the knife in substantially fixed operative relation thereto and bearing on the feather just in advance of thecutting edge of the knife,

said guide, gauge, and knife having a motion relative to the feather to cut'the latter,; andmeans holding the feather in advance .oftheknife.

5. Apparatus of claim 4 wherein-said-means comprises aholding foot reciprocable transversely to the feather at the opposite side of the gauge from the knife.

6. Apparatus of claim 4 wherein saidmeans comprises a feather-engaging holding foot ;reciprocable-vertically to and from the feather, the knife, guide and gauge being reciprocable toget-her as a unit in the direction of the length-of the feather.

'7. Apparatus of claim 4 wherein said means comprises a feather-engaging holding foot reciprocable normally to the feather, the knife, guide, and gauge being relatively reciprocable; in the direction of ,thelengthof the feather, and :a .recess in the gaugereceiving' the holdingfoot to approach the latter closer to the knife ;at intervals when theholdingfoot and gaugecome into closest contact during the cutting action.

8. Apparatus for trimming :the feather of .a welt-type insole having a'sewing rib comprising a knife, 2. pressure guide engaging the rib atthe interior sidethereof, theknife being located-to cut the feather, a presser gauge for the knife, engaging the feather in advance of the cutting-edge of the knife, the gauge and knife being in relatively fixed relation, a recess in the gauge at the side of the latter opposite the knife, a featherholding foot intermittently operable to hold the feather during cutting, said foot being partially received insaid recess-to bring the foot as closeas possible to the knife edge.

9. Apparatus for trimming the feather of :a welt-type insole having a sewing rib comprising a knife, a'support, a pressure. guide for the knife thereon, said guide engaging the rib at the opposite side. thereof from the knifeto guide the latter relative tothe rib, and a feather-holding foot enga eablewith the feat er in advance oftheknife.

.10. Appa atus of: claim .9 wherein said pressure gu d .Qomprises arleve movable relative to the support, and resilientmean constantly ur ingcan end of he. le e toward the rib.-

App ra us f claim 9 wherein said pressure guide comprises a lever pivotedv to thegsupport; and including ,a spring to urge oneend of thelever into engagement with the rib, the vother end-of the lever actin asa handle.

12. Apparatus for reducing the thickness of the feather of a welt-type insole having a rib comprising a unit capable of reciprocation in the direction of the length of the feather, said unit Comprising a knife in position to cut the feather, a presser gauge engaging the feather adjacent and in advance of the knife edge and a pressure guide engaging the rib at the side thereof opposite the knife, and a feather-holding foot reciprocable normal to the feather and transverse to the direction of reciprocation of the unit in position to substantially engage the presser gauge during the cutting stroke of the unit.

6 13. Apparatus of claim 12 wherein the presser gauge is provided with a recess in position to at least partially receive the feather-holding foot.

14. Apparatus of claim 12 wherein the presser gauge is provided with a recess at the side thereof facing the holding foot, said holding foot extending partially into said recess duringcutting action of the knife.

VICTOR A. SHERBROOK. 

